Movable louver



Oct. 8, 1940.

L. COSCWSKY MOVABLE LOUVER Filed Feb. 26, 1940' INVENTOR awk Comms/KPatented Oct. 8, 1940 UNITED STATES PATENT oEFicE 4 Claims.

This invention relates to new and useful improvements in a movablelouver,

The invention particularly proposes to characterize the louver by atubular body adapted to be engaged through a wall, and having outwardlyextending flanges on its front and rear ends, and shutter plates mountedacross the sides of said frame and operated in a particular manner.

More specifically, the invention contemplates mounting the 'shutterplates on a plurality of spaced parallel rods which are turnably mountedbetween opposite walls of the tubular frame, and it is proposed toprovide the rods with crank portions on one of their ends disposed in aspace between the tubular frame and an end wall mounted across theflanges of the tubular frame, and further proposed to provide certainmechanism for moving said crank portions in unison for opening andclosing the shutter plates.

The invention contemplates the use of a bar connecting the crankstogether to move in unison, and a novel arrangement for moving the barto open and close the shutter plates. y

Another object of the invention resides in characterizing the meansmentioned in the previous paragraph by a pivotally mounted handle oflimited amplitude associated with a link which is pivotally connectedwith the handle and pivotally connected with the bar and serves totransmit an oscillating motion to the bar when the handle is moved.

Still further it is proposed to provide a means for shifting the linkalong the handle to various positions to control the extent to which theshutter plates are opened.

For further comprehension of the invention, and of the objects andadvantages thereof, reference will be had to the following description4and accompanying drawing, and to the appended claims in which thevarious novel features of the invention are more particularly set forth.

In the accompanying drawing forming a material part of this disclosure-Fig. 1 is a perspective view of a movable louver constructed accordingto this invention.

Fig. 2 is a transverse vertical sectional view taken on the line 2 2 ofFig; 1.

Fig. 3 is a transverse vertical sectional View taken on the line 3-3 ofFig. 1.

Fig. 4 is a reduced elevational View looking in the direction of theline 4-4 of Fig. 3.

Fig. 5 is an enlarged horizontal sectional view taken on the line 5 5 ofFig. 4.

Fig. 6 isa fragmentary edge elevationalview similar to Fig. 3 butillustrating a modified form of the invention.

Fig. 7 is a fragmentary horizontal sectional view taken on the line l-'lof Fig. 6.

Fig. 8 is a perspective view of the handle used in Figs. 6 and '7,illustrated per se.

The movable louver, according to this invention, includes a tubularframe Ill for engagement through a wall and having outwardly extendingflanges I0@ and Illb at its front and rear ends, respectively. Thetubular frame Il) has a shoulder portion Iiic near its rear end. The topwall Il!d of the frame tapers downwards from the front to the rear. Theside walls IIle and the bottom wall IIlf are straight from the front tothe rear. A screen I I is mounted across the outside iiange Ib.This-screen has edge portions I Ic bent over the edges of the flangeIllb.

End walls I2 are mounted across the edges of vthe end walls I2. Shutterplates I5 are mounted upon the rods I4 and extend in length across thesides of the tubular frame i0. These shutter plates have curved topportions I5a adapted to mate with the bottom edges of adjacent shutterplates in a manner to close the louver when the shutter plates aresubstantially in the vertical plane. The uppermost shutter plate I5 isadapted to engage against the shoulder IGC. The ends of each of theshutter plates I5 also engage against the shoulder Ill, but morespecifically, only against the shoulder portions Illc at the sides ofthe frame Ill. The dot and d'ash lines in Fig. 2, indicate the openpositions of the shutter plates I5.

A bar Il connects the crank i4@ together to move-in unison with eachother. This is accomplished merely by forming openings 'I8 in the barI'I through which the ends of the cranks Illa engage. The bar I'I isvertically slidably guided by several straps I9 mounted upon the sideWall of the tubular frame Ill.

A pivotally mounted handle 25 of limited amplitude projects through anopening in the front flange I Ba. This handle has a double hook shapedfront end 25a adapted to be engaged by a conventional window openingpole in a manner so that the louver may be opened or closed ashereinafter more fully described.

The handle 2li is pivotally supported by a pintle 2| mounted on the sidewall of the tubular frame Ill. The handle 26 is limited in amplitude bypins 22 and 23 which are mounted upon and project from the side wall ofthe tubular frame I0 and are located above and below the inner end ofthe handle 20. A link 24 is pivotally connected at one end with thehandle 2!! and extends downwards at a slight angle and is pivotallyconnected with the bar |l'. This pivotal connection is accomplished byhaving the link Z4 engage the uppermost crank Elia. The dot and dashlines 2|), and ida in Fig. 3 represent the shifted positions of thecorresponding full line parts which they assume when the louver isopened.

The operation of the device is as follows:

As illustrated by the full lines on the drawing, the louver is in itsclosed position. In order to open the louver it is required that awindow pole or other implement be engaged against the bottom of theextended end of the handle 20, and then the handle is forced upwards.This indirectly forces the bar downwards which indirectly turns the rodsIll. The shutters I5 which are attached to the rods correspondingly turnand now the louver is opened. It may be closed by engaging a hook on theextended end of the handle 20 and pulling down to pull the handle 2i]back to its original position.

In Figs. 6 8 inclusive a modied form of the invention has been disclosedwhich is very similar v to the prior form, distinguishing merely in thefact that a means has been provided for shifting the link 24 along thehandle 20 for varying the amplitude through which the shutter plates I5are moved by operation of the handle Z0. Specifically, this meansincludes a rod 26 which is rotatively mounted upon the handle 2B'. Thisrod has a head 21 on its inner end rotatively engaging a socket 28formed on the handle 20. The handle 2U is provided with several stampedout strip portions 29 near its outer end which form bearings for the rod25. A head 3U is mounted on the extended end of the rod by which the rodmay be readily turned. A follower 3| is threadedly engaged on a sectionof the rod 26. The link 24 is pivotally connected with the follower Slby a pintle 32. In other respects this form of the invention is similarto the previous form.

The operation of this form or" the device is as follows:

The handle 2B may be rotated to move the follower 3i along the threadedportion of the rod 26. Since the top one of the shutter plates I5 isengaging the shoulder Hlc and cannot move, the handle 20' will pivot adistance depending on the amount that the screw 26 is turned. Moreover,the follower 3| will assume a position spaced a greater distance fromthe pivot 2| of the handle 20. The louver may be opened similar to thefunctioning previously described. The handle 2S is forced upwards. Thismoves the inner end of the handle downwards and the motion istransmitted by the link 24 to move the bar I1 downwards. However, sincethe follower 3| is at a greater distance from the pivot 2| it will movethrough a larger arcuate distance, and so move the bar Il through alarger distance. This will control the extent to which the shutterplates I5 open when the handle 20 is moved to its fully opened position.

While I have illustrated and described the preferred embodiments of myinvention, it is to be understood that I do not limit myself to theprecise constructions herein disclosed and the right is reserved to allchanges and modications coming within the scope of the invention asdefined in the appended claims.

Having thus described my invention, what I claim as new, and desire tosecure by United States Letters Patent is:

1. A movable louver, comprising a tubular frame, for engagement througha wall and having outwardly extending anges on its front and rear ends,a screen mounted across the outside one of said flanges, end wallsmounted across the edges of said flanges, a plurality of spaced parallelrods turnably mounted between opposite walls of said tubular frame andhaving crank portions on one of their ends disposed in the space betweensaid tubular frame and one of said end walls, shutter plates mounted onsaid rods and extending across said tubular frame, a bar connecting saidcranks together to move in unison, a pivotally mounted limited amplitudehandle projecting from said front flange and having an inner end, a linkpivotally connected with said handle and pivotally connected with saidbar, and means for shifting said link along said handle to Variousposition, including a rod rotatively mounted on the handle and having athreaded section, a follower mounted on said threaded section, and saidlink being pivotally mounted on said follower.

2. A movable louver, comprising a tubular frame, for engagement througha wall and having outwardly extending flanges on its front and rearends, a screen mounted across the outside one of said flanges, end wallsmounted across the edges of said ilanges, a plurality of spaced parallelrods turnably mounted between opposite walls of said tubular frame andhaving crank portions on one of their ends disposed in the space betweensaid tubular frame and one of said end walls, shutter plates mounted onsaid rods and extending across said tubular frame, a bar connecting saidcranks together to move in unison, a pivotally mounted limited amplitudehandle projecting from said front ange and having an inner end, a linkpivotally connected with said handle and pivotally connected with saidbar, and means for shifting said link along said handle to variousposition, including a rod rotatively mounted on the handle and having athreaded section, a follower mounted on said threaded section, and saidlink being pivotally mounted on said follower, and said rod beingextended to the outer end of the handle and provided with a head bywhich it may be readily turned.

3. In a device of the class described, a frame, a plurality of spacedrods turnably mounted between opposite Walls of said frame, crankportions formed on the ends of said rods, shutter plates mounted on saidrods and extending across said frame, a bar connecting said cranks tomove in unison, a pivotally mounted handle, a link having one endpivotally connected to said bar, a follower pivotally mounted on thefree end of said link and slidably engaging a longitudinal slot in saidhandle, and means for holding said follower in various shifted positionsalong the length o1" said slot for changing the point of pivotalconnection of said link with said handle to control the distance throughWhich said shutter plates will move when said handle is pivoted.

4. In a device of the class described, a frame,

a plurality of spaced rods turnably mounted between opposite Walls ofsaid frame, crank portions formed on the ends of said rods, shutterplates mounted on said rods and extending across said frame, a barconnecting said cranks to move in unison, a pivotally mounted handle, alink having one end pivotally connected to said bar, a. followerpivotally mounted on the free end o-f said link and slidably engaging alongitudinal slot in 1U said handle, and means for holding said followerin various shifted positions along the length of said slot for changingthe point of pivotal connection of said link .with said handle tocontrol the distance through Which said shutter plates will move Whensaid handle is pivoted, comprising a rod rotatively mounted on saidhandle and having a threaded section engaging through said follower forshifting said follower along the length of said slot as said rod isturned. l

LOUIS COSOWSKY.

